066
FNCA52 TJSJ 130913
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
513 AM AST TUE JAN 13 2026
DISCUSSION
KBDI VALUES IN CABO ROJO ARE AROUND 610, WHILE IN CAMP SANTIAGO,
THEY ARE AROUND 546. DAYTIME MINIMUM RH VALUES ARE EXPECTED TO
DROP NEAR CRITICAL VALUES THIS AFTERNOON; HOWEVER, WE EXPECT
SHOWER ACTIVITY TO FORM OVER THE WESTERN INTERIOR AND SOME MAY
REACH THE SOUTHWEST QUADRANT AT TIMES. ADDITIONALLY, E TO NE WINDS
WILL RANGE BETWEEN 8 AND 12 MPH WITH HIGHER GUSTS DUE TO SEA
BREEZE VARIATIONS. WINDS WILL INCREASE AND VEER FROM THE EAST-
SOUTHEAST FROM WEDNESDAY THROUGH FRIDAY. WE ENCOURAGE THE FIRE-
WEATHER COMMUNITY TO MONITOR THE DRYING TREND, AS CONDITIONS COULD
WORSEN IF NO RAINFALL OCCURS OVER THESE LOCATIONS.
PRZ014-140915-
SOUTHEAST COASTAL PLAINS-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 40
TEMP (24H TREND) 87 (+3) 68 (-1) 87
RH % (24H TREND) 50 (-7) 95 (+2) 57
WIND 20FT/EARLY(MPH) E 12 NE 11 E 13 G18
WIND 20FT/LATE(MPH) E 12 NE 11 E 13 G18
MIXING HGT(FT-AGL/MSL)4780 4540
TRANSPORT WND (MPH) E 8 E 15
VENT RATE (KT-FT) 33460 59020
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-140915-
SOUTHERN HILLS-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 0 40
TEMP (24H TREND) 83 (+4) 65 (-2) 83
RH % (24H TREND) 61 (-10) 97 (+2) 62
WIND 20FT/EARLY(MPH) E 9 NE 9 SE 11
WIND 20FT/LATE(MPH) E 9 NE 9 SE 11
MIXING HGT(FT-AGL/MSL)5470 5020
TRANSPORT WND (MPH) E 6 E 14
VENT RATE (KT-FT) 27350 60240
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-140915-
NORTH COASTAL PLAINS-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30
TEMP (24H TREND) 85 (+1) 67 (-2) 86
RH % (24H TREND) 61 (-9) 100 (+2) 60
WIND 20FT/EARLY(MPH) E 12 E 11 E 13
WIND 20FT/LATE(MPH) E 12 E 11 E 13
MIXING HGT(FT-AGL/MSL)4800 4840
TRANSPORT WND (MPH) E 9 E 13
VENT RATE (KT-FT) 38400 53240
DISPERSION 5 5
DSI 5 4 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-140915-
NORTHERN HILLS-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30
TEMP (24H TREND) 84 (+2) 65 (-2) 85
RH % (24H TREND) 60 (-9) 99 (0) 58
WIND 20FT/EARLY(MPH) NE 11 E 9 E 11
WIND 20FT/LATE(MPH) NE 11 E 9 E 11
MIXING HGT(FT-AGL/MSL)5740 5940
TRANSPORT WND (MPH) E 6 SE 9
VENT RATE (KT-FT) 28700 47520
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-140915-
WEST COAST-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 40 30
TEMP (24H TREND) 86 (+1) 66 (-2) 87
RH % (24H TREND) 58 (-9) 99 (+2) 59
WIND 20FT/EARLY(MPH) SE 10 NE 12 E 13
WIND 20FT/LATE(MPH) SE 10 NE 12 E 13
MIXING HGT(FT-AGL/MSL)4010 4540
TRANSPORT WND (MPH) SE 3 SE 10
VENT RATE (KT-FT) 12030 40860
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-140915-
EASTERN INTERIOR-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 40
TEMP (24H TREND) 83 (+2) 66 (-2) 84
RH % (24H TREND) 64 (-8) 99 (+1) 65
WIND 20FT/EARLY(MPH) E 9 E 9 E 11
WIND 20FT/LATE(MPH) E 9 E 9 E 11
MIXING HGT(FT-AGL/MSL)6010 4900
TRANSPORT WND (MPH) E 7 SE 14
VENT RATE (KT-FT) 36060 58800
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-140915-
LUQUILLO MOUNTAIN RANGE-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 40
TEMP (24H TREND) 79 (+2) 65 (-2) 79
RH % (24H TREND) 70 (-5) 99 (0) 71
WIND 20FT/EARLY(MPH) E 8 E 6 E 10
WIND 20FT/LATE(MPH) E 8 E 6 E 10
MIXING HGT(FT-AGL/MSL)4640 4020
TRANSPORT WND (MPH) E 8 SE 14
VENT RATE (KT-FT) 32480 48240
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-140915-
CENTRAL MOUNTAIN RANGE-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 30 30
TEMP (24H TREND) 82 (+4) 62 (-3) 82
RH % (24H TREND) 61 (-10) 99 (0) 60
WIND 20FT/EARLY(MPH) E 8 E 8 SE 8
WIND 20FT/LATE(MPH) E 8 E 8 SE 8
MIXING HGT(FT-AGL/MSL)6960 6500
TRANSPORT WND (MPH) E 2 SE 8
VENT RATE (KT-FT) 13920 45500
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-140915-
CAYEY MOUNTAIN RANGE-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 40
TEMP (24H TREND) 78 (+1) 65 (-1) 79
RH % (24H TREND) 70 (-6) 99 (0) 71
WIND 20FT/EARLY(MPH) E 8 E 8 E 9
WIND 20FT/LATE(MPH) E 8 E 8 E 9
MIXING HGT(FT-AGL/MSL)4890 4470
TRANSPORT WND (MPH) E 8 E 15
VENT RATE (KT-FT) 34230 58110
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-140915-
VIEQUES-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 59 (-3) 94 (-1) 60
WIND 20FT/EARLY(MPH) E 10 E 13 E 12
WIND 20FT/LATE(MPH) E 10 E 13 E 12
MIXING HGT(FT-AGL/MSL)3880 3450
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 34920 48300
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-140915-
CULEBRA-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 30
TEMP (24H TREND) 85 (0) 73 (-1) 85
RH % (24H TREND) 61 (-3) 90 (+2) 61
WIND 20FT/EARLY(MPH) E 9 E 13 G17 E 12
WIND 20FT/LATE(MPH) E 9 E 13 G17 E 12
MIXING HGT(FT-AGL/MSL)3680 3460
TRANSPORT WND (MPH) E 10 E 16
VENT RATE (KT-FT) 33120 48440
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-140915-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 20
TEMP (24H TREND) 88 (+3) 67 (-2) 88
RH % (24H TREND) 50 (-6) 93 (+2) 57
WIND 20FT/EARLY(MPH) SE 12 E 11 E 19 G24
WIND 20FT/LATE(MPH) SE 12 E 11 E 19 G24
MIXING HGT(FT-AGL/MSL)4300 4640
TRANSPORT WND (MPH) E 8 E 16
VENT RATE (KT-FT) 30100 64960
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-140915-
SAINT THOMAS AND SAINT JOHN-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 30
TEMP (24H TREND) 85 (+1) 72 (-2) 85
RH % (24H TREND) 59 (-6) 93 (+2) 60
WIND 20FT/EARLY(MPH) E 10 E 12 E 12
WIND 20FT/LATE(MPH) E 10 E 12 E 12
MIXING HGT(FT-AGL/MSL)3670 3500
TRANSPORT WND (MPH) E 12 E 16
VENT RATE (KT-FT) 36700 49000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-140915-
ST CROIX-
513 AM AST TUE JAN 13 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 40
TEMP (24H TREND) 86 (+1) 71 (-3) 86
RH % (24H TREND) 60 (-5) 93 (+3) 62
WIND 20FT/EARLY(MPH) E 11 E 12 E 13
WIND 20FT/LATE(MPH) E 11 E 12 E 13
MIXING HGT(FT-AGL/MSL)4420 4280
TRANSPORT WND (MPH) E 13 E 17
VENT RATE (KT-FT) 48620 64200
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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